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  2. Power nap - Wikipedia

    en.wikipedia.org/wiki/Power_nap

    A power nap, also known as a Stage 2 nap, is a short slumber of 20 minutes or less which terminates before the occurrence of deep slow-wave sleep, intended to quickly revitalize the napper. The expression "power nap" was coined by Cornell University social psychologist James Maas. [2] The 20-minute nap increases alertness and motor skills. [2]

  3. Nap - Wikipedia

    en.wikipedia.org/wiki/Nap

    A nap is a short period of sleep, typically taken during daytime hours as an adjunct to the usual nocturnal sleep period. Naps are most often taken as a response to drowsiness during waking hours. A nap is a form of biphasic or polyphasic sleep, where the latter terms also include longer periods of sleep in addition to one period. For years ...

  4. Polyphasic sleep - Wikipedia

    en.wikipedia.org/wiki/Polyphasic_sleep

    Longer naps were found to be better, with some cognitive functions benefiting more from napping than others. Vigilance and basic alertness benefited the least while working memory benefited greatly. Naps in the individual subjects' biological daytime worked well, but naps in their nighttime were followed by much greater sleep inertia lasting up ...

  5. Mathematical sociology - Wikipedia

    en.wikipedia.org/wiki/Mathematical_sociology

    Mathematical Bridge, or officially Wooden Bridge, is an arch bridge in Cambridge, United Kingdom.The arrangement of timbers is a series of tangents that describe the arc of the bridge, with radial members to tie the tangents together and triangulate the structure, making it rigid and self-supporting.

  6. Social system - Wikipedia

    en.wikipedia.org/wiki/Social_system

    In sociology, a social system is the patterned network of relationships constituting a coherent whole that exist between individuals, groups, and institutions. [1] It is the formal structure of role and status that can form in a small, stable group. [1]

  7. Manifest and latent functions and dysfunctions - Wikipedia

    en.wikipedia.org/wiki/Manifest_and_latent...

    Manifest functions are the consequences that people see, observe or even expect. It is explicitly stated and understood by the participants in the relevant action. The manifest function of a rain dance, according to Merton in his 1957 Social Theory and Social Structure, is to produce rain, and this outcome is intended and desired by people participating in the ritual.

  8. Non-aggression principle - Wikipedia

    en.wikipedia.org/wiki/Non-aggression_principle

    Although the NAP is meant to guarantee an individual's sovereignty, libertarians greatly differ on the conditions under which the NAP applies. Especially unsolicited intervention by others, either to prevent society from being harmed by the individual's actions or to prevent an incompetent individual from being harmed by his own actions or ...

  9. Sociological theory - Wikipedia

    en.wikipedia.org/wiki/Sociological_theory

    A sociological theory is a supposition that intends to consider, analyze, and/or explain objects of social reality from a sociological perspective, [1]: 14 drawing connections between individual concepts in order to organize and substantiate sociological knowledge.